Add dummy implementation of about_flags for Android.

chrome/browser/sync/profile_sync_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/profile_sync_service.h"
 
 #include <cstddef>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 719 matching lines @@
       Difference(to_add, registered_types);
   DVLOG(2) << "OnExperimentsChanged called with types: "
            << syncable::ModelTypeSetToString(to_add);
   DVLOG(2) << "Enabling types: " << syncable::ModelTypeSetToString(to_register);
 
   for (syncable::ModelTypeSet::Iterator it = to_register.First();
        it.Good(); it.Inc()) {
     // Received notice to enable experimental type. Check if the type is
     // registered, and if not register a new datatype controller.
     RegisterNewDataType(it.Get());
-#if !defined(OS_ANDROID)
     // Enable the about:flags switch for the experimental type so we don't have
     // to always perform this reconfiguration. Once we set this, the type will
     // remain registered on restart, so we will no longer go down this code
     // path.
     std::string experiment_name = GetExperimentNameForDataType(it.Get());
     if (experiment_name.empty())
       continue;
     about_flags::SetExperimentEnabled(g_browser_process->local_state(),
                                       experiment_name,
                                       true);
-#endif  // !defined(OS_ANDROID)
   }
 
   // Check if the user has "Keep Everything Synced" enabled. If so, we want
   // to turn on all experimental types if they're not already on. Otherwise we
   // leave them off.
   // Note: if any types are already registered, we don't turn them on. This
   // covers the case where we're already in the process of reconfiguring
   // to turn an experimental type on.
   if (sync_prefs_.HasKeepEverythingSynced()) {
     // Mark all data types as preferred.
@@ skipping 961 matching lines @@
   // See http://stackoverflow.com/questions/6224121/is-new-this-myclass-undefined-behaviour-after-directly-calling-the-destru.
   ProfileSyncService* old_this = this;
   this->~ProfileSyncService();
   new(old_this) ProfileSyncService(
       new ProfileSyncComponentsFactoryImpl(profile,
                                            CommandLine::ForCurrentProcess()),
       profile,
       signin,
       behavior);
 }